Questions from College Physics

Q: A voltage DV is applied across the ends of a Nichrome heater

A voltage DV is applied across the ends of a Nichrome heater wire having a cross-sectional area A and length L. The same voltage is applied across the ends of a second Nichrome heater wire having a cr...

Q: For the two resistors shown in Figure 17.12, rank

For the two resistors shown in Figure 17.12, rank the currents at points a through f from largest to smallest. (a) Ia = Ib > Ie = If > Ic = Id (b) Ia = Ib > Ic = Id > Ie = If (c) Ie = If &...

Q: Two resistors, A and B, are connected in a series

Two resistors, A and B, are connected in a series circuit with a battery. The resistance of A is twice that of B. Which resistor dissipates more power? (a) Resistor A does. (b) Resistor B does. (c) Mo...

Q: True or False: While discharging, the terminal voltage of a

True or False: While discharging, the terminal voltage of a battery can never be greater than the emf of the battery.

Q: Why does a battery get warm while in use?

Why does a battery get warm while in use?

Q: In Figure 18.5, the current is measured with the

In Figure 18.5, the current is measured with the ammeter at the bottom of the circuit. When the switch is opened, does the reading on the ammeter (a) Increase, (b) Decrease, or (c) Not change? Figure...

Q: The circuit in Figure 18.5 consists of two resistors,

The circuit in Figure 18.5 consists of two resistors, a switch, an ammeter, and a battery. When the switch is closed, power Pc is delivered to resistor R1. When the switch is opened, which of the foll...

Q: In Figure 18.8, the current is measured with the

In Figure 18.8, the current is measured with the ammeter on the right side of the circuit diagram. When the switch is closed, does the reading on the ammeter (a) Increase, (b) Decrease, or (c) Remain...

Q: When the switch is open in Figure 18.8, power

When the switch is open in Figure 18.8, power Po is delivered to the resistor R1. When the switch is closed, which of the following is true about the power Pc delivered to R1? (Neglect the internal re...

Q: Suppose you have three identical light-bulbs, some wire,

Suppose you have three identical light-bulbs, some wire, and a battery. You connect one light-bulb to the battery and take note of its brightness. You add a second light-bulb, connecting it in paralle...